Fusible Nickel

Film Resistors

FN Series

© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

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04.09

Welwyn Components

Packaging

All FN resistors are supplied tape packed ready for loading on

to automatic sequencing and insertion machines.

Component wires will not protrude beyond the outside edge

of the tapes.

Alternative packaging available by request.

A detailed Packaging Data Sheet is available upon request.

Lead Formed resistors can also be supplied. Standard options

of Lancet, Radial and Goalpost forming are shown in Lead

Form Information section

52

f1

f2

6

6

5

Body location f1 – f2 ≤ 1.4 mm

Fusing

After fusing the final resistance value will be

≥10 times the

initial value.

Maximum

Load: 1000 hours at 70°C

∆R%

1

Shelf life: 12 months at room temperature

∆R%

0.5

Derating from rated power at 70°C

zero at 155°C

Long term damp heat

∆R%

1

Resistance to solder heat

∆R%

0.5

Fusing characteristics

See graph

Performance Data

Type

FN4

Large ammo pack

5000

Standard Quantities Per Package

Ordering Procedure

Example: FN4 at 0.33 ohms and 10% tolerance in ammo pack box of 5000 pieces -

F N 4 – R 3 3 K I

Type

Value (use IEC62 code)

Tolerance (use IEC62 code)

J

5%

K

10%

M 20%

Packing

I

Ammo

5000/box

Standard

OBSOLETE